Is there a way to stop people promoting graphics?

I'm returning to streaming after many years and have started fresh, but my god do I never remember there being this many people promoting their graphics, overlays etc.

Every stream I get at least like 6 people coming in over the course of like 4-6 hours and it's always the same few formulae. I b*n them of course but reporting to Twitch seems to do nothing

Is there any way to prevent them in the first place? I feel like I've taken all the measures possible with moderation settings